I have a Hyper-V 2016 cluster with different nodes. This cluster is managed by SCVMM 2016. We make use of Hyper-V Network Virtualization with 5 NVGRE gateways. This cluster runs 400 VM's in 200 virtual networks (education).
The system has been running for more than 6 months, but yesterday there was a problem with outgoing traffic (from inside the virtual networks to the internet). If we try to refresh a VM, it always ends with one error (and the only error in general):
Error (13641) The specified subnet prefix must be between the starting and ending values for the range. Starting value: 4 Ending value: 30
Recommended Action:
Specify a suitable subnet prefix.
We have already tried to reboot the cluster and the gateways. Refreshing the hosts (Get-SCVMHost | Read-SCVMhost -RunAsynchronously) works fine.
Suggestions?
